Step by step
The question
Question: compare 99 and 100.
Which is more?
Compare 99 and 100
1 Show the tens and ones
99 is 9 tens and 9 ones.
100 is 1 hundred.
That is 10 tens.
2 Compare the tens
Look at the tens first.
9 tens is less than 10 tens.
So 100 is more.
9 tens < 10 tens
3 Write it with a sign
99 is less than 100.
We write 99 < 100.
99 < 100
The sign < means less than.
The sign > means greater than.
Greater means more.
The open side faces the bigger number.
< less than
> greater than
Careful!
99 has more ones.
But the tens count more.
10 tens is more than 9 tens.
Careful: not 99 > 100 ✗
4 Check
On the number line, bigger numbers are to the right.
Yes!
It works.
100 is right of 99
Let's look back.
First: show the tens and ones.
Then: compare the tens.
Then: write it with a sign.
Last: check.
Answer
Careful: not 99 > 100 ✗